Y. Cancho et al., DIASTEREOCONTROLLED SYNTHESIS OF PYRROLIDINES BY NICKEL PROMOTED TANDEM CYCLIZATION-QUENCHING OF AMINOBROMODIENES, Tetrahedron, 54(7), 1998, pp. 1221-1232
The nickel promoted tandem cyclization-quenching of tethered aminobrom
odienes has been extended to the synthesis of 2,3,4-trisubstituted pyr
rolidines. By a judicious choice of substituents on the starting amino
halodiene, the diastereoselectivity of the process can be efficiently
controlled. When a chiral auxiliary on the nitrogen atom is used, enan
tiomerically enriched pyrrolidines can be obtained after removal of th
e auxiliary. (C) 1998 Elsevier Science Ltd. All rights reserved.